[TenTec] Problem with Orion 2 driving an Ameritron 811H Linear

[Duane Calvin]

What kind of amp are you driving, Tom?  If it's a grounded-grid amp, your
values aren't that far off (most require full 100W output on the drive to
reach full rated output.)  If it is, then I'd wonder if you're using the
same method of measuring power from the rig.  (The Orion's power meter is
not linear, I've found.)

	73, Duane


Duane Calvin, AC5AA
Austin, Texas
www.ac5aa.com  
 

-----Original Message-----
From: tentec-bounces at contesting.com [mailto:tentec-bounces at contesting.com]
On Behalf Of Tom
Sent: Monday, February 08, 2010 4:29 PM
To: TenTec at contesting.com
Subject: [TenTec] Problem with Orion 2 driving an Ameritron 811H Linear

I have found that my Orion 2 (w/ model 709 TT mike) will drive my linear to
a max. output of 300 watts while providing 40 watts of drive. My IC765 (w/
the model SM20 mike) will drive the same linear with 35 watts to an output
of 500 watts. I have switched coax leads, etc. to try to account for bad
hardware, etc.

As per suggestions from TenTec, I tune the rigs and adjust the linear
settings using only the CW mode, tried some compression, adjusted the mike
gain and even increased the 
TX EQ (from zero to -12 ) and nothing increased the ability of the Orion 2
to provide more than a max. output of 300 watts. Meanwhile, the "good old"
IC765 cooks along yielding 500 watts for a drive of 30 watts. What 'am I
overlooking? The only variable I can see is the rigs/mikes. Has anyone run
into a similar problem or do you have any suggestions as to what I should
try next?

Will appreciate any input you could provide.

73,  Tom N3XQ

 
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